We are given that (dy)/(dx) = sqrt(1 - y ^ 2) (d ^ 2 * y)/(d * x ^ 2) (d ^ 2 * y)/(d * x ^ 2) = Find an expression for in terms of and y

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (–4, 0) and (6, 0). the y-intercept of the first parabola is (0, –12). the y-intercept of the second parabola is (0, –24). what is the positive difference between the a values for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth